/// <summary>
/// 在指定子类型（T2）的情况下，从当前层级开始逐层向下查找特定类型的对象（T1）
/// </summary>
public static List <T1> GetChildrenOrSelf <T1, T2>(DependencyObject objReference) where T1 : FrameworkElement where T2 : FrameworkElement
{
List <T1> listRetval = new List <T1>();
do
{
if (null == objReference)
{
break;
}
if (objReference is T2)
{
break;
}
if (objReference is T1)
{
listRetval.Add((T1)objReference);
break;
}
int iChildrenCount = VisualTreeHelper.GetChildrenCount(objReference);
if (0 >= iChildrenCount)
{
break;
}
for (int i = 0; i < iChildrenCount; ++i)
{
DependencyObject objChild = VisualTreeHelper.GetChild(objReference, i);
if (objChild is T1)
{
listRetval.Add((T1)objChild);
continue;
}
List <T1> listGrandChilds = VisualTreeHelperEx.GetChildrenOrSelf <T1, T2>(objChild);
if (null != listGrandChilds && listGrandChilds.Count > 0)
{
listRetval.AddRange(listGrandChilds);
}
}
}while (false);
return(listRetval);
}
